| 主权项 |
1. A guiding catheter, comprising:
an elongated wall structure extending along a length of the catheter defining an inner lumen and an outer lumen, said inner lumen having a substantially a complete oval cross-sectional shape, the elongated wall structure defining the inner lumen including a plurality of torque transmittal guidance walls having a flat cross-sectional surface, said plurality of torque transmittal guidance walls being made of a different material than a remainder of said elongated wall structure, said plurality of torque transmittal guidance walls being substantially flexible in a dimension perpendicular to the flat cross-sectional surface of said plurality of torque transmittal guidance walls but substantially not flexible in a dimension parallel to the flat cross-sectional surface of said plurality of torque transmittal guidance walls, and said outer lumen substantially having a cross-sectional shape of a portion of a circle, wherein said outer lumen is disposed to one side of said inner lumen, and said elongated wall structure defines a second outer lumen having a cross-sectional shape of a portion of a circle disposed to another, opposite side of said inner lumen, and wherein said wall structure defining said inner lumen and said inner lumen extend distally beyond said outer lumens; and an elongated stiffener in said outer lumen, said elongated stiffener being formed of a polymeric material conforming to the shape of said outer lumen, and said elongated stiffener including a central wire. |
